Fe

Iron · element 26

Transition Metal · Solid at room temperature

Iron is a chemical element with symbol Fe (from Latin:ferrum) and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core.

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Fragments of an iron meteorite, about 92% iron. Original size of the single pieces in cm: 0.4 - 0.8
Fragments of an iron meteorite, about 92% iron. Original size of the single pieces in cm: 0.4 - 0.8 - Chemical ELements A Virtual Museum, CC BY 3.0 <https://creativecommons.org/licenses/by/3.0> source: https://images-of-elements.com/iron.php

Key facts

Atomic mass
55.8452 u
how heavy one atom is
Phase (room temp.)
Solid
Density
7.874 g/cm³
how tightly packed it is
Melting point
1811 K (1538 °C)
when solid turns to liquid
Boiling point
3134 K (2861 °C)
when liquid turns to gas
Period
4
its row in the periodic table
Group
8
its column in the periodic table
Block
D-block
the neighbourhood it lives in
Electronegativity
1.83
how strongly it pulls electrons
Electron configuration
[Ar] 3d6 4s2
where its electrons live
Shells
2 · 8 · 14 · 2
electrons in each layer, inside to out
Discovered by
5000 BC
who found it
Appearance
lustrous metallic with a grayish tinge
what it looks like

Source: Wikipedia

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